:root {
  --vivo-blue: #1976d2;
  --vivo-cyan: #00e5ff;
  --vivo-purple: #7b1fa2;
  --vivo-dark: #121212;
  --vivo-card-bg: #1e1e1e;
  --neon-glow: 0 0 10px rgba(0, 229, 255, 0.7), 0 0 20px rgba(0, 229, 255, 0.5),
    0 0 30px rgba(0, 229, 255, 0.3);
}

body {
  font-family: "Montserrat", sans-serif;
  background-color: var(--vivo-dark);
  color: #fff;
  overflow-x: hidden;
}
.navbar {
  background-color: rgba(18, 18, 18, 0.1) !important;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 15px 0;
}
.icons a {
  color: rgba(255, 255, 255, 0.9);
  padding: 0 10px;
}
.icons a:hover {
  color: var(--vivo-cyan);
  text-shadow: var(--neon-glow);
}
.nav-link {
  color: rgba(255, 255, 255, 0.9);
  margin: 0 12px;
  position: relative;
}
.nav-link:hover {
  text-shadow: var(--neon-glow);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  background: linear-gradient(90deg, var(--vivo-cyan), var(--vivo-blue));
  height: 2px;
  width: 0;
  transition: all 0.3s;
}
.nav-link:hover::after {
  width: 100%;
}
.navbar-brand,
.navbar-brand:hover {
  font-weight: 700;
  font-size: 28px;
  background: linear-gradient(45deg, var(--vivo-cyan), var(--vivo-blue));
  /* 文字裁剪 */
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: var(--neon-glow);
}
.banner {
  width: 100%;
  height: 50vw;
  mask-image: linear-gradient(rgb(0, 0, 0) 80%, rgba(0, 0, 0, 0) 100%);
}
.banner .carousel-item img {
  width: 100%;
  height: 50vw;
}
.carousel-caption {
  bottom: 6rem;
  font-size: 20px;
}
.carousel-indicators {
  margin-bottom: 5rem;
}
.hot-product .info {
  color: rgba(255, 255, 255, 0.7);
}
.card{
  background-color: var(--vivo-card-bg);
  border-radius: 15px;
  border:1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s;
}
.card-box{
  background-color: #292929;
  padding:20px 25px 35px;
  border-radius: 15px 15px 0 0;
}
.card-body .card-title{
  color:#fff;
}
.card-body .card-text{
  color:#ccc;
}
.card-price{
  font-size: 24px;
  color:var(--vivo-cyan);
  font-weight:600;
}
.card:hover{
  transform: translateY(-10px);
  border-color:rgba(0, 229, 255, 0.3)
}
.card-body .btn{
  width:100%;
  border:2px solid var(--vivo-cyan);
  border-radius: 30px;
  background: none;
  padding: 10px 0;
  color:var(--vivo-cyan)
}
.card-body .btn:hover{
  box-shadow: var(--neon-glow);
}
.future-tech{
  position: relative;
  background: url(/img/bg1.avif) 
  no-repeat;
  background-position: center;
  background-size:cover;
  /* 背景图片固定定位 */
  background-attachment: fixed;
}
.future-tech::before{
  position:absolute;
  content: '';
  left:0;
  top:0;
  width: 100%;
  height: 100%;
  background: rgba(18,18,18,0.9);
}
.future-icon{
  font-size: 3rem;
  color: var(--vivo-cyan);
  text-shadow: var(--neon-glow);
  margin-bottom: 20px;
}
.future-title{
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: #fff;
}
.future-desc{
  color:rgba(255, 255, 255, 0.7);
}
.footer{
  background-color: #000;
  padding-top: 80px;
}
.footer dt{
  font-size: 1.2rem;
  font-weight: 600;
  padding-bottom: 10px;
  margin-bottom: 25px;
  position: relative;
}
.footer dt::after{
  position: absolute;
  content:'';
  left: 0;
  bottom: 0;
  background: linear-gradient(90deg, var(--vivo-cyan), var(--vivo-blue));
  height: 2px;
  width: 40px;
}
.footer dd a{
  display: block;
  text-decoration: none;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
  transition: all 0.3s;
  margin-bottom: 15px;
}
.footer dd a:hover{
  color: var(--vivo-cyan);
  transform: translateX(12px);
}
.footer dd .icons{
  display: flex;
  margin-top: 1.2rem;
}
.footer dd .icons a{
  background-color: rgba(255, 255, 255, 0.1);
  margin-right: 15px;
  width:40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.2rem;
  line-height: 40px;
  text-align: center;
  text-decoration: none;
}
.footer .icons a:hover{
  box-shadow: var(--neon-glow);
  color: #fff;
  background: linear-gradient(45deg,var(--vivo-blue),var(--vivo-cyan));
  transform: translateY(-5px);
}
.footer .news{
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}
.footer .form-control::placeholder{
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
}
.footer .dingyue{
  color:#fff;
  font-weight: 600;
  font-size: 0.9rem;
  background: linear-gradient(45deg,var(--vivo-blue),var(--vivo-cyan));
  border-radius: 0 20px 20px 0;
  width:80px;
  height: 40px;
  transition: all 0.3s;
}
.footer .dingyue:hover{
  transform: translateY(-3px);
  box-shadow: var(--neon-glow);
}
.copyright{
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
}